My freakin' "Cajones" still hurt from using that type of stool  it's a crotch destroyer!!!

 OUCH!!...sitter BEWARE 

Thank goodness for 45 day returns.  
  Definitely need to test before i buy... 
Yea it feels good when your first sit down..I'm talking about 4 hrs being in the saddle that little bump in the crotch area will get to ya after a while, it's there so drummers don't slide forward when they play.......the throne Nigel recommended previously is perfect and comfy.......  
http://www.soundseat.com/Many Options, Made in the USA, and nothing is better IMO
If you care about your back go for it.